Results 11 to 20 of about 4,032 (172)

Temperature dependence of the magnetic properties in LaMnO_(3+δ) [PDF]

open access: yes, 2006
Data are presented on the thermal dependence of the hysteretic properties of cationic vacancies including manganite samples of composition LaMnO_(3+δ)(δ=0.05 and 0.12). Our results evidence the presence in both samples of two magnetic phases having ferro-
Arroyo, A.   +7 more
core   +2 more sources

Estudio longitudinal sobre la construcción de conceptos Enlace, solubilidad y conductividad

open access: yesEducación Química, 2018
La finalidad central de este estudio se orienta hacia la búsqueda de las concepciones previas de los estudiantes de licenciatura en Química de la Facultad de Química de la UNAM, acerca de conceptos cuya adquisición resulta indispensable para comprender ...
Ana E. Domínguez   +3 more
doaj   +1 more source

Correlação entre o conteúdo inorgânico e a polimerização da matriz orgânica das resinas compostas para restaurações dentárias: uma revisão narrativa

open access: yesRevSALUS, 2022
Introdução: Nos últimos anos, as resinas compostas têm sido melhoradas em termos tecnológicos, permitindo o alcance de melhores prognósticos na medicina dentária.
Rita Fidalgo-Pereira   +5 more
doaj   +1 more source

SOLID STATE MORPHOLOGY AND SIZE TUNING OF NANOSTRUCTURED PLATINUM USING MACROMOLECULAR COMPLEXES [PDF]

open access: yes, 2015
Indexación: Web of Science; Scielo.The macromolecular complexes Chitosan●(PtCl2)n and PSP-co-4-PVP●(PtCl2)n, were prepared from the respective polymer and PtCl2 in metal:polymer molar ratios 1:1 and 1:5. Pyrolisis of the macromolecular complexes Chitosan●
BAEZ, RODRIGO   +3 more
core   +2 more sources

Recursos per treballar a l’aula la formulació i nomenclatura de química inorgànica

open access: yesCiències, 2015
L’article presenta diversos recursos i activitats elaborats per l’autor que permeten treballar la formulació i nomenclatura de química inorgànica a les classes de química d’educació secundària i de batxillerat, seguint les darreres recomanacions ...
José Ángel Hernández Santadaríao
doaj   +1 more source

On the use of diatomite as antishrinkage additive in the preparation of monolithic carbon aerogels [PDF]

open access: yes, 2015
We have synthesized flexible monolithic carbon aerogels by incorporating diatomite as antishrinkage agent during the sol-gel polycondensation of the precursors.
García, T.E.   +6 more
core   +1 more source

Synthesis, Characterization, Crystal Structure, and Biological Studies of a Cadmium(II) Complex with a Tridentate Ligand 4′-Chloro-2,2′:6′,2′′-Terpyridine

open access: yesBioinorganic Chemistry and Applications, 2011
A new Cd(II) complex with the ligand 4′-chloro-2,2′6′,2′′-terpyridine (Cltpy), [Cd(Cltpy)(I)2], has been synthesized and characterized by CHN elemental analysis, 1H-NMR, 13C-NMR, and IR spectroscopy and structurally analyzed by X-ray single-crystal ...
L. A. Saghatforoush   +3 more
doaj   +1 more source

3-Allyl-6-bromo-1H-imidazo[4,5-b]pyridin-2(3H)-one [PDF]

open access: yes, 2011
In the title compound, C15H14N2O4, (I), the mol­ecule lies on a twofold rotation axis which passes through the central C atom of the aliphatic chain, giving one half-mol­ecule per asymmetric unit.
Bolte, Michael   +4 more
core   +3 more sources

Thermally induced interconversions of metal-pyrimidine-4,6-dicarboxylate polymers: A structural, spectroscopic, and magnetic study [PDF]

open access: yes, 2009
Continuing our work on the structural and magnetic aspects of the one-dimensional (1-D) coordination polymers of the [M(pmdc)(H2O)2]\ub7H2O kind (M Fe, Co, Ni, Cu, Zn; pmdc pyrimidine-4,6-dicarboxylate), we have combined ab initio X-ray powder ...
Barea, Elisa   +10 more
core   +1 more source

A preliminary study on electrocatalytic reduction of CO2 using FAC-ReI(CO)3(4,4′-dimethyl-2,2′-bipyridyl)((E)-2-((3-amino-pyridin-4-ylimino)-methyl)-4,6-DI-tert-butylphenol))+ complex [PDF]

open access: yes, 2017
Indexación: Scopus.Several research to explore the possible conversion of CO2 using rhenium(I) tricarbonyl complexes have been reported the last years.
Canales, J.C.   +4 more
core  

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